Amphastar Pharmaceuticals Inc.
Organization details
- Legal name
- Amphastar Pharmaceuticals Inc.
- Ownership
- Public
- Status
- Active
- Sector (GICS)
- Health Care
- SIC code
- 2834 — Pharmaceutical Preparations
- Headquarters city
- Rancho Cucamonga
- Headquarters state / province
- California
- Headquarters country
- United States
- Fiscal year end
- December
- Ticker symbol
- AMPH
- Primary stock exchange
- Nasdaq
Identifiers
- SEC CIK
- 0001297184
- EIN
- 33-0702205
Board of directors
-
Anthony T. Pierce · DirectorSince 2026
-
David Russell Gaugh · DirectorSince 2025
-
Diane G. Gerst · DirectorSince 2023
-
Floyd F. Petersen · DirectorSince 2023
-
Gayle Deflin · DirectorSince 2023
-
Howard Lee · DirectorSince 2023
-
Jack Y. Zhang · Director · CEO & CHIEF SCIENTIFIC OFFICERSince 2023
-
Mary Z. Luo · Director · COO, Chief Scientist, ChairmanSince 2023
-
Michael A. Zasloff · DirectorSince 2023
-
Richard K. Prins · DirectorSince 2023
-
William J. Peters · Director · CFO, EVP & TREASURERSince 2023
-
Yakob Liawatidewi · Director · EVP CORP ADMIN CENTERSince 2023
Chief executives
Director election results
Annual meeting of June 1, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
66.7%
-
99.4%
Board connections
1 of this board's directors also sit on 1 other board. 1 is in the same sector.
-
IGC Pharma Inc. Same sectorvia Richard K. Prins
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
- Bought, last 12 months
- $0
- 0 purchases by 0 insiders
- Sold, last 12 months
- $2,497,594
- 12 sales by 4 insiders
| Date | Insider | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Nov 5, 2026 | William J. Peters Director, Officer (CFO, EVP & TREASURER) | Option exercise | +11,000 | $17.99 | $197,890 |
| Nov 5, 2026 | William J. Peters Director, Officer (CFO, EVP & TREASURER) | Open-market sale | −12,631 | $28.99 | $366,189 |
| Nov 4, 2026 | William J. Peters Director, Officer (CFO, EVP & TREASURER) | Option exercise | +16,000 | $13.03 | $208,480 |
| Nov 4, 2026 | William J. Peters Director, Officer (CFO, EVP & TREASURER) | Open-market sale | −16,000 | $28.03 | $448,480 |
| Sep 21, 2026 | William J. Peters Director, Officer (CFO, EVP & TREASURER) | Open-market sale | −4,139 | $25.00 | $103,475 |
| Sep 16, 2026 | Zhou Rong Officer (SENIOR EVP, PRODUCTION CENTER) | Option exercise | +10,000 | $13.35 | $133,500 |
| Sep 16, 2026 | Zhou Rong Officer (SENIOR EVP, PRODUCTION CENTER) | Open-market sale | −10,000 | $23.94 | $239,400 |
| Sep 2, 2026 | Zhou Rong Officer (SENIOR EVP, PRODUCTION CENTER) | Open-market sale | −3,187 | $23.63 | $75,309 |
| Aug 11, 2026 | Richard K. Prins Director | Open-market sale | −7,973 | $20.30 | $161,852 |
| Aug 7, 2026 | William J. Peters Director, Officer (CFO, EVP & TREASURER) | Option exercise | +5,053 | $19.79 | $99,999 |
| Aug 7, 2026 | William J. Peters Director, Officer (CFO, EVP & TREASURER) | Open-market sale | −8,180 | $22.48 | $183,886 |
| Jul 9, 2026 | Anthony T. Pierce Director | Grant or award | +7,886 | — | — |
| Jun 2, 2026 | Howard Lee Director | Shares withheld for tax | −769 | $18.45 | $14,188 |
| Jun 1, 2026 | Howard Lee Director | Grant or award | +8,143 | — | — |
| Jun 1, 2026 | Michael A. Zasloff Director | Grant or award | +8,143 | — | — |
Peers
Compare boardsOrganizations in the same sector, closest in location and size first.
Questions about Amphastar Pharmaceuticals Inc.
Who is the CEO of Amphastar Pharmaceuticals Inc.?
Jack Y. Zhang is Amphastar Pharmaceuticals Inc.'s CEO & Chief Scientific Officer.
How many directors are on Amphastar Pharmaceuticals Inc.'s board?
Amphastar Pharmaceuticals Inc.'s board has 12 directors: Anthony T. Pierce, David Russell Gaugh, Diane G. Gerst, Floyd F. Petersen, Gayle Deflin, Howard Lee, Jack Y. Zhang, Mary Z. Luo, Michael A. Zasloff, Richard K. Prins and 2 others.
Are Amphastar Pharmaceuticals Inc. insiders buying or selling shares?
Over the last 12 months, Amphastar Pharmaceuticals Inc. insiders made no open-market purchases and sold $2.5 million of shares in 12 sales on the open market, as reported to the SEC on Forms 4 and 5.
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